#include <stdio.h>
#include <stdlib.h>
int main()
{
    int i = 0;
    //int i = 0;
    //for(;i<10;i++)
    //{
    //    printf("num = %d\n",i);
    //}
    //return 0;
    //获取PATH环境变量
	printf("PATH = %s\n",getenv("PATH"));
	printf("who = %s\n",getenv("USER"));
	return 0;
}
